/*!
 *****************************************************************************
 * @file:    CN0394.cpp
 * @brief:
 * @version: $Revision$
 * @date:    $Date$
 *-----------------------------------------------------------------------------
 *
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 *
 *****************************************************************************/

#ifndef CN0394_H_
#define CN0394_H_

#include <stdio.h>
#include <string.h>
#include <stdbool.h>


#define YES    1
#define NO     0

typedef enum
{
   CHANNEL_1 = 0,
   CHANNEL_2,
   CHANNEL_3,
   CHANNEL_4
} cn0394_channel;


extern int32_t adc0[4], adc1[4];
extern bool calibFlag0, calibFlag1;
extern uint8_t write0, write1;

extern void CN0394_DisplayData(void);
extern void CN0394_SetData(void);
extern void CN0394_Init(void);
extern float CN0394_CalcVoltage(uint8_t channel, int32_t adcValue);
extern void CN0394_ChannelConfig(uint8_t channel, uint8_t adcInput);
extern float CN0394_CalcCurrent(float voltage);
extern  float CN0394_CalcRrtd(int32_t adc);
extern void CN0394_StartConversion(uint8_t channel);
extern void CN0394_Calc_RTDTemperature(cn0394_channel ch, float *temp);
extern void CN0394_Calc_ThermocoupleTemperature(cn0394_channel ch, float cjTemp, float *buffer);
extern void CN0394_Calibration(uint8_t channel);


#define RTD_CHANNEL    0
#define TH_CHANNEL     1

#define R5             1600.0 //ohmi

#define I_EXC          0.620   // mA

#define VREF0          (R5*I_EXC)  //mV
#define VREF1          1200.0  //mV
#define _2_28          268435456.0

#define POLY_CALC(retVal, inVal, coeff_array) \
{ \
    float expVal = 1.0f; \
    const float* coeff = coeff_array; \
    retVal = 0.0f; \
    while(*coeff != 1.0f)\
    { \
        retVal += *coeff * expVal; \
        expVal *= inVal; \
        coeff++; \
    }\
}

/* Enable/disable calibration for each channel */
#define USE_RTD_CALIBRATION   YES              //YES or NO
#define USE_TH_CALIBRATION    YES              //YES or NO

#define DISPLAY_REFRESH   1000       //ms


#endif /* CN0394_H_ */

